In situ FT-IR study of the adsorption and photocatalytic oxidation of ethanol over sulfated and metallized TiO2

NAP-XPS Study of Ethanol Adsorption on TiO2 Surfaces and Its Impact on Microwave-Based Gas Sensors Response

“…(Figure 3). This observation is consistent with previous report, where ethanol was submitted to titania surfaces under FT-IR investigations [6]. Nonetheless, the majority of the ethanol is physically adsorbed on the surface.…”

A novel planar integration of all-solid-state capacitor and photodetector by an ultra-thin transparent sulfated TiO 2 film

“…Two absorption bands around 1128 and 1429 cm À 1 in the spectra of the sulfated TiO 2 films indicate clearly that the bidentate sulfate functional groups have been successfully modified on the TiO 2 nanoparticle surface [23,30,31,38]. The structure of the sulfate group on TiO 2 surface is described in Figure 2.…”

“…The surface hydroxyl groups on the Brønsted sites favor trapping of the photogenerated holes, and then highly active hydroxyl radicals are created on the sulfated TiO 2 surface [22,30,31,33]. Since the transformation of the surface groups alters the surface localized state, the equilibrium of the Helmholtz layer is upset.…”

“…Finally, the obtained films were calcined in air at a temperature up to 450 1C. The heating rate was 3 1C/min, and the holding time was 2 h. And then a simple sulfation procedure [30,33], which had been widely employed in the catalysis field, was adopted to sulfate the TiO 2 film as shown in Figure 1. The TiO 2 films were immersed into concentrated sulfuric acid at 90 1C with different treatment times, including 0.5 h (0.5-TiO 2 ), 1 h (1-TiO 2 ), 2 h (2-TiO 2 ), 4 h (4-TiO 2 ) and 8 h (8-TiO 2 ).…”

“…TiO 2 thin films were prepared using a common sol-gel dipcoating method [30,31]. Firstly, a TiO 2 solution was prepared by dissolving 10 mL titanium butoxide (Ti(OC 4 H 9 ) 4 ) into 50 mL ethanol.…”